Here's why:
* Most apes are omnivores: This means they eat both plants and meat.
* Gorillas are mostly herbivores: They primarily eat leaves, stems, and fruits, but may occasionally eat insects or small animals.
* Chimpanzees are omnivores: They consume a wide variety of foods, including fruits, leaves, insects, and even small mammals.
* Orangutans are primarily frugivores: They eat mostly fruit but also consume leaves, bark, and insects.
* Bonobos are also omnivores: Their diet is similar to chimpanzees, including fruit, leaves, insects, and small mammals.
Strong teeth are not a guarantee of a meat-based diet: Apes have strong teeth for chewing tough plant matter, like leaves and stems. These teeth are also useful for cracking open nuts and fruits, and for consuming insects.
So, while some apes are mostly vegetarian (like gorillas), most apes are omnivores and have strong teeth for a variety of dietary needs.